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Unable To Refuel Vehicle: Mustang

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  1. Testing fuel Filler Pipe & Check Valve -  Remove fuel filler cap. Connect Evaporative Emissions System Leak Tester (134-00056) to fuel filler pipe. Turn ignition on. Using scan tool, close canister vent solenoid. Select OUTPUT TEST MODE, FTP and FTP V PID. Select ALL OFF mode. Press START button on scan tool to close canister vent solenoid. Access PCM PID FTP V. Pressurize system to 14 in. H2O (3.48 kPa). If PCM PID FTP V is 4.22-4.90 volts, go to next step. If PCM PID FTP V is not as specified, go to step  10.

  2. Testing EVAP System For Restriction

    Attempt to pressurize system to 14 in. H2O (3.48 kPa). If system pressurizes, go to next step. If system does not pressurize, perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed.

  3. Testing Fresh Air Vent Hose For Blockage

    Disconnect fresh air vent hose from fuel filler pipe inside trunk. Pressurize system to 14 in. H2O (3.48 kPa). If pressure drops immediately, replace fresh air vent hose. Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed. If pressure does not drop immediately, go to next step.

  4. Testing Fresh Air Vent Hose At Fuel Filler Pipe For Blockage

    Disconnect fresh air vent hose at fuel filler pipe. Pressurize system to 14 in. H2O (3.48 kPa). If pressure drops immediately, replace fuel filler pipe. Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed. If pressure does not drop immediately, go to next step.

  5. Testing Tank Vapor Valve Assembly Fresh Air Tube For Blockage

    Disconnect tank vapor valve assembly fresh air tube from canister vent solenoid vent hose. Pressurize system to 14 in. H2O (3.48 kPa). If pressure drops immediately, replace tank vapor valve assembly fresh air tube. Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed. If pressure does not drop immediately, go to next step.

  6. Testing Canister Vent Solenoid Hose For Blockage

    Disconnect canister vent solenoid hose at canister vent solenoid. Pressurize system to 14 in. H2O (3.48 kPa). If pressure drops immediately, replace canister vent solenoid hose. Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed. If pressure does not drop immediately, go to next step.

  7. Testing EVAP Canister Vent Solenoid For Blockage

    Disconnect canister vent solenoid from EVAP canister. Pressurize system to 14 in. H2O (3.48 kPa). If pressure drops immediately, replace canister vent solenoid. Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed. If pressure does not drop immediately, go to next step.

  8. Testing EVAP Canister For Blockage

    Disconnect EVAP canister inlet elbow from EVAP canister. Pressurize system to 14 in. H2O (3.48 kPa). If pressure drops immediately, replace EVAP canister. Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed. If pressure does not drop immediately, go to next step.

  9. Testing EVAP Canister Inlet Elbow For Blockage

    Disconnect fuel vapor control valve tube from EVAP canister inlet elbow. Pressurize system to 14 in. H2O (3.48 kPa). If pressure drops immediately, replace EVAP canister inlet elbow. Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed. If pressure does not drop immediately, go to next step.

  10. Check For Pinched Fuel Vapor Control Valve Tube

    Lower fuel tank about 3/4" (19 mm). If not already done, close canister vent solenoid. Select OUTPUT TEST MODE, FTP and FTP V PID. Select ALL OFF mode. Press START button on scan tool to close canister vent solenoid. Access PCM PID FTP V. Pressurize system to 14 in. H2O (3.48 kPa). If PCM PID FTP V is 4.22-4.90 volts, replace fuel vapor control valve tube assembly. Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed. If PCM PID FTP V is not as specified, go to next step.

  11. Testing For Fuel Filler Tube Assembly Blockage

    Disconnect tank vapor recirculation tube from fuel filler pipe and plug both ends. Pressurize system to 14 in. H2O (3.48 kPa). Remove plug from tank vapor recirculation tube. If pressure drops immediately, replace fuel vapor control valve tube assembly. Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed. If pressure does not drop immediately, replace fuel filler pipe. Perform evaporative emissions system leak test. See EVAPORATIVE EMISSIONS SYSTEM LEAK TEST . If system passes, perform DRIVE CYCLES in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article. Ensure PENDING CODE CHECK & EVAP MONITOR "BYPASS" CHECK is performed.
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